/* SQUIB - Scala's Quirky User Interface Builder 
    Copyright (C) 2008 Tim Dalton

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
*/

import scala.collection.mutable.HashMap 
    
package tfd.scala.squib.scenario.scenegraph {

    import java.awt.Component
    import java.util.EventObject

    import com.sun.scenario.scenegraph._
    import com.sun.scenario.scenegraph.event._

    import tfd.scala.squib.FiresEventObjects

    // Since descendents of AbstractButton and JTextField have addActionListener method but not from
    // an common ancestor or interface, we'll have to resort to structural typing
    trait FiresSGNodeEvents[T <: {  def addNodeListener(nl:SGNodeListener) }] { self:FiresEventObjects with IdableTrait =>

        self.eventHandlers += (sgNodeEvents _).asInstanceOf[(Object, HashMap[String, EventObject => Unit]) => Unit]

        def sgNodeEvents(comp: T, events:HashMap[String, EventObject => Unit]):T = {
            val delegate = events.get("boundschanged")
            if (!delegate.isEmpty) {
                comp.addNodeListener(new DelegateSGNodeEventHandler(delegate.get))
            }
            comp
        }

        class DelegateSGNodeEventHandler(delegate: SGNodeEvent => Unit) extends SGNodeListener {
            override def boundsChanged(ne: SGNodeEvent) {
                delegate(ne)
            }
        }
    }
}